import mapper.UserMapper;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import pojo.User;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

public class MybatisDemo03 {


    public static void main(String[] args) throws IOException {
//        操作Mybatis的4个步骤
//        1、加载mybatis-config.xml 配置文件，创建工厂类
        InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
        SqlSessionFactory factory = new SqlSessionFactoryBuilder().build(is);
//        2，创建SqlSession
        SqlSession sqlSession = factory.openSession();

//        3、执行SQL语句
//        List<User> userList = sqlSession.selectList("test.selectAll");
        UserMapper usermapper = sqlSession.getMapper(UserMapper.class);
//        List<User> userList = usermapper.selectAll();
        User oneUser = usermapper.selectOne(1);
        System.out.println(oneUser);
        //        4、关闭SqlSession
        sqlSession.close();
//        for (User user : userList) {
//            System.out.println(user);
//        }

    }
}